<template>
  <div>
       <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-alert
        title="添加商品信息"
        center=""
         show-icon
        type="info">
      </el-alert>
        <!--步骤条区域 -->
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
          <!--tab区域 -->
          <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" :label-position="'left'">
       <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
        <el-tab-pane label="基本信息" name="0">
           <el-form-item label="商品名称" prop="goods_name">
             <el-input v-model="addForm.goods_name"></el-input>
           </el-form-item>
             <el-form-item label="商品价格" prop="goods_price">
             <el-input v-model="addForm.goods_price" type="number"></el-input>
           </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
             <el-input v-model="addForm.goods_weight" type="number"></el-input>
           </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
             <el-input v-model="addForm.goods_number" type="number"></el-input>
           </el-form-item>
           <el-form-item label="商品分类">
              <el-cascader
                props="goods_cat"
                expand-trigger="hover"
                :options="catelist"
                :props="cateProps"
                v-model=" addForm.goods_cat"
                @change="handleChange">
              </el-cascader>
           </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品参数" name="1">
             <!--渲染表单的item项 -->
           <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
            <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border ></el-checkbox>
               
              </el-checkbox-group>

           </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品属性" name="2">
          <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
            <el-input v-model="item.attr_vals" ></el-input>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品图片" name="3">
           <el-upload
                class="upload-demo"
                :action="uploadURL"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                 list-type="picture"
                 :headers="headerObj"
                 :on-success='handleSuccess'
                >
                <el-button size="small" type="primary">点击上传</el-button>
                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
        </el-tab-pane>
        <el-tab-pane label="商品内容" name="4">
           <quill-editor v-model="addForm.goods_introduce">
           
           </quill-editor>           
               <el-button type="primary" class="btnAdd" @click="Add">添加商品</el-button>
        </el-tab-pane>
    </el-tabs>
        </el-form>
    </el-card>

    <el-dialog
      title="图片预览"
      :visible.sync="priewVisible"
      width="50%"
      >
        <img :src="previewPath" alt="" class="preViewimg">
     
</el-dialog>

  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
      return {
          activeIndex:'0',
          // 添加商品的表单数据对象
          addForm:{
            goods_name:'',
            goods_price:0,
            goods_weight:0,
            goods_number:0,
            // 商品所属的分组
            goods_cat:[],
                 // 图片的数组
            pics:[],
            // 商品详情描述
            goods_introduce:'',
            attrs:[]

          },
          addFormRules:{
            goods_name:[{required: true, message:'请输入商品名称', trigger: 'blur'}],
            goods_price:[{required: true, message:'请输入商品价格', trigger: 'blur'}],
            goods_weight:[{required: true, message:'请输入商品重量', trigger: 'blur'}],
            goods_number:[{required: true, message:'请输入商品数量', trigger: 'blur'}],
            goods_cat:[{required: true, message:'请输入商品分类', trigger: 'blur'}],
          },
          // 商品分类列表
          catelist:[],
          cateProps:{
            label:'cat_name',
            value:'cat_id',
            children:'children'
          },
          // 动态参数列表数据
          manyTableData:[],
          // 静态属性列表数组
          onlyTableData:[],
          uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
          headerObj:{
            Authorization:window.sessionStorage.getItem('token')
          },
          previewPath:'',
          priewVisible:false
     
      }
  },
  created() {
    this.getCateList()
  },
  computed:{
    cateId(){
      if(this.addForm.goods_cat.length===3){
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  methods:{
  async  getCateList(){
   const{ data:res} = await this.$http.get(`categories`)
    if (res.meta.status !== 200) { return this.$message.error('获取商品分类数据失败！') }
    this.catelist=res.data

   },
  //  级联选择器选中项发生变化 会触发这个函数
   handleChange(){
     if(this.addForm.goods_cat.length!==3){
       this.addForm.goods_cat=[]
     }
   },
   beforeTabLeave(activename ,oldActivename){
      // console.log('即将离开的'+oldActivename,);
      // console.log('即将进入的'+activename,);
      if(oldActivename==='0'&&this.addForm.goods_cat.length!==3){
        this.$message.error('请先选择商品分类！')
        return false
      }
   },
  async  tabClicked(){
      //  console.log(this.activeIndex);
      if(this.activeIndex==='1'){
        // console.log('动态参数面板');
      const {data:res}=  await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
      if (res.meta.status !== 200) { return this.$message.error('获取动态参数列表失败！') }
      // console.log(res.data);
       res.data.forEach(item=>{
         item.attr_vals=item.attr_vals.length===0 ? [] :  item.attr_vals.split(',')
       
       })
          this.manyTableData=res.data
      } else if(this.activeIndex==='2'){
          const {data:res}=  await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
           if (res.meta.status !== 200) { return this.$message.error('获取静态属性失败！') }
           console.log(res.data);
           this.onlyTableData=res.data
      }
   },
  //处理 图片的预览效果
   handlePreview(file){
        console.log(file);
        this.previewPath=file.response.data.url
        this.priewVisible=true
   },
    //移出  图片的预览效果
   handleRemove(file){
      // console.log(file);
      const filePath=file.response.data.tmp_path
      const i=this.addForm.pics.findIndex(x=>x.pic===filePath)
      this.addForm.pics.splice(i,1)
      console.log(this.addForm);
   },
  //  图片上传成功的事件
   handleSuccess(response){
     console.log(response);
     // 1.拼接得到一个图片信息对象 临时路径
      const picInfo = {pic: response.data.tmp_path}
      
   
      // 2.将图片信息对象，push到pics数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm);
   },
  Add(){
      // console.log(this.addForm);
      this.$refs.addFormRef.validate( async valid=>{
        if(!valid){
          return this.$message.error('请填写必要的表单项')
        }
        // 添加的业务逻辑
        const  form =_.cloneDeep(this.addForm)
        form.goods_cat=form.goods_cat.join(',')
       
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
          form.attrs = this.addForm.attrs
        console.log(form);
        // 发起请求添加商品
        // 商品名称必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败！')
        this.$message.success('添加商品成功!')
        this.$router.push('/goods')
      })
   }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0  0 !important;
}
.preViewimg{
  width: 100%;
}
.btnAdd{
   margin-top: 15px;
}
</style>